def db_write_lock(namespace_id):
""" Protect updating this namespace's Inbox datastore data.
Note that you should also use this to wrap any code that _figures
out_ what to update the datastore with, because outside the lock
you can't guarantee no one is updating the data behind your back.
"""
return Lock(_db_write_lockfile_name(namespace_id), block=True)
def _get_lock_object(cls, account_id, lock_for=dict()):
""" Make sure we only create one lock per account per process.
(Default args are initialized at import time, so `lock_for` acts as a
module-level memory cache.)
"""
return lock_for.setdefault(
account_id, Lock(cls._sync_lockfile_name(account_id), block=False))
from inbox.util.concurrency import retry_with_logging
from inbox.log import get_logger, log_uncaught_errors
logger = get_logger()
from inbox.models.session import session_scope
from inbox.models import ActionLog, Namespace
from inbox.sqlalchemy_ext.util import safer_yield_per
from inbox.util.file import Lock
from inbox.actions import (mark_read, mark_unread, archive, unarchive, star,
unstar, save_draft, delete_draft, mark_spam,
unmark_spam, mark_trash, unmark_trash, send_draft,
send_directly)
# Global lock to ensure that only one instance of the syncback service is
# running at once. Otherwise different instances might execute the same action
# twice.
syncback_lock = Lock('/var/lock/inbox_syncback/global.lock', block=False)
ACTION_FUNCTION_MAP = {
'archive': archive,
'unarchive': unarchive,
'mark_read': mark_read,
'mark_unread': mark_unread,
'star': star,
'unstar': unstar,
'mark_spam': mark_spam,
'unmark_spam': unmark_spam,
'mark_trash': mark_trash,
'unmark_trash': unmark_trash,
'send_draft': send_draft,
'save_draft': save_draft,
'delete_draft': delete_draft,
def lock(block, filename=None):
if filename is None:
handle, filename = tempfile.mkstemp()
return Lock(filename, block=block)